Man pages matching name gnutls_psk_client_get_hint in section 3:

gnutls_psk_client_get_hint.3.en	debian 10 / gnutls-doc
gnutls_psk_client_get_hint.3.en	debian 11 / gnutls-doc
gnutls_psk_client_get_hint.3.en	debian 12 / gnutls-doc